Transceiving channel anti-interference system based on river acoustic tomography flow measurement and control method thereof

Abstract

The invention discloses a transmitting and receiving channel anti-interference system based on river acoustic tomography flow measurement and a control method thereof, the system comprises a control host and a plurality of groups of independently matched probes, and each group of probes comprises a transmitting transducer and a receiving transducer; adjacent groups of probe receiving / transmitting channels work independently; when each transmitting transducer is vertically arranged, the angle of the vertical directivity of a transmitting signal needs to be greater than 60 degrees; the working frequency band of the receiving transducers in the same group is at least 3% wider than the working frequency band of the correspondingly matched transmitting transducers; the transmitting transducer is arranged above the water on the same shore; and the receiving transducers of the adjacent groups of probes are arranged below the water on the same bank beyond the intensity curve range in which the sound intensity weakening of the transmitting signals of the transmitting transducers is greater than-3dB. According to the system and the method, interference of various factors can be reduced, and the quality of received sound wave signals and the measurement stability are improved.

Description

Technical Field

[0001] This invention relates to the field of intelligent analysis of river flow measurement data, and in particular to an anti-interference system and control method for a transceiver channel based on river acoustic tomography. Background Technology

[0002] River acoustic tomography measures the flow velocity and flow rate of a large river by transmitting acoustic signals and analyzing the received signals. Existing river acoustic tomography systems mostly use transceiver integrated transducers, which are simple to deploy and control, do not take into account the interference of various environmental factors, and are also subject to mutual interference of various acoustic signals from the equipment itself.

[0003] The transducers in the existing system are omnidirectional, transceiver-integrated transducers. Based on the conventional piezoelectric response and receiving sensitivity of the transducers, there are problems of repulsion and impedance characteristics in the channel transmission. Often, amplifying the signal will also amplify the noise signal. Suppressing the noise will also suppress the acoustic signal. Therefore, in the transceiver-integrated system, noise interference cannot be reduced, accurately filtered, and the signal quality and stability cannot be improved.

[0004] Existing flow measurement systems, such as the patent titled "Three-Anchored Buoy Acoustic Tomography Station" (application number CN202210701321.9), include a base station base and measurement components. The base station base includes an equipment compartment with a power supply component on top and multiple floats surrounding it. The measurement components include a hydrophone and a transmitter. Three anchors are evenly arranged around the base station base, each consisting of an anchor connected to the base station base via anchor chains. Floats are positioned near the anchor chains close to the base station base. A positioning and timing device is located on top of the base station base. This measurement station uses an integrated transceiver transducer, which suffers from equipment vibration interference, mutual clutter interference, and low signal reception quality. Summary of the Invention

[0005] To overcome the design flaws of existing river acoustic tomography systems, reduce interference from various factors, and improve the quality of received acoustic signals and measurement stability, this invention provides an anti-interference system for the transceiver channel based on river acoustic tomography and its control method.

[0006] First, the present invention provides an anti-interference system for transceiver channels based on river acoustic tomography, including a control host, multiple sets of independently matched probes, each set of probes including a transmitting transducer and a receiving transducer; the transceiver channels of adjacent sets of probes operate independently;

[0007] Based on the operating frequency band of each group of transmitting transducers, each of the transmitting transducers has a matching piezoelectric response in that operating frequency band, and when each of the transmitting transducers is vertically installed, the angle of the vertical directivity of the transmitted signal needs to be greater than 60 degrees.

[0008] Based on the operating frequency band of each group of receiving transducers, each receiving transducer has a matching and consistent receiving sensitivity in that operating frequency band; the operating frequency band of the receiving transducers in the same group is at least 3% wider than the operating frequency band of the corresponding matching transmitting transducer; each receiving transducer is connected to a corresponding matching signal amplifier, and all are connected to the AD acquisition circuit of the control host.

[0009] The transmitting transducer is installed above the water on the same bank; outside the intensity curve range where the transmitted signal intensity attenuation of the transmitting transducer is greater than -3dB, the receiving transducers of adjacent groups of probes are installed below the water on the same bank.

[0010] Furthermore, the transmitting transducer and the receiving transducer of the adjacent group of probes are deployed on the same side of the river channel, and the distance between the transmitting transducer and the receiving transducer of the adjacent group of probes is greater than twice the wavelength of the transmitted signal.

[0011] Furthermore, the transmitting transducers deployed on the same side of the river channel and the receiving transducers of the adjacent probe groups are connected together by vibration-damping material components.

[0012] In one implementation, the probe includes a transmitting transducer and multiple receiving transducers. Multiple receiving transducers are vertically arranged on the same side of the river channel. The spacing between each vertically arranged receiving transducer is adjusted according to the change of water sound velocity at different temperatures. The distance between adjacent receiving transducers is such that the water temperature difference is greater than 1°C.

[0013] Secondly, this invention also provides a control method for an anti-interference system of a transceiver channel based on river acoustic tomography, comprising the following steps:

[0014] (1) Multiple sets of independently matched probes are connected through a control host. Each set of probes includes a transmitting transducer and a receiving transducer. The transmitting / receiving channels of adjacent sets of probes work independently.

[0015] (2) The transmitting transducer is installed above the water on the same bank;

[0016] Outside the intensity curve range where the transmitted signal intensity of the transmitting transducer attenuates by more than -3dB, the receiving transducer with adjacent groups of probes is installed in the water below the same bank.

[0017] (3) According to the working frequency band of each group of transmitting transducers, adjust each of the transmitting transducers to have a matching piezoelectric response in the working frequency band. When each of the transmitting transducers is vertically installed, the angle of the vertical directivity of the transmitting signal needs to be greater than 60 degrees.

[0018] Based on the operating frequency band of each group of receiving transducers, each receiving transducer is adjusted to have a matching and consistent receiving sensitivity in that operating frequency band; the operating frequency band of the receiving transducers in the same group is at least 3% wider than the operating frequency band of the corresponding matching transmitting transducer.

[0019] Furthermore, it also includes the step of adjusting the impedance matching of the transmitting channel of each group of probes to achieve the maximum transmission power.

[0020] Furthermore, it also includes a transmitting transducer deployed on the same side of the river channel and the receiving transducer of the adjacent group of probes, wherein the distance between the transmitting transducer and the receiving transducer of the adjacent group of probes is greater than twice the wavelength of the transmitted signal.

[0021] Furthermore, the transmitting transducers deployed on the same side of the river channel and the receiving transducers of adjacent probe groups are connected together by vibration-damping material components to reduce vibration and noise interference.

[0022] In one implementation, the probe includes a transmitting transducer and multiple receiving transducers. Multiple receiving transducers can be vertically deployed on the same side of the river. The deployment spacing of each vertically arranged receiving transducer is adjusted according to the change of water sound velocity at different temperatures. The distance between adjacent receiving transducers is such that the water temperature difference is greater than 1°C.

[0023] The technical advantages of the anti-interference system and control method of the present invention are as follows:

[0024] (1) Compared with existing systems that mostly use transceiver transducers, which simultaneously transmit and receive sound wave signals from the other side of the river at the same location, various interferences will occur, affecting the quality of the received signal.

[0025] This invention relates to an anti-interference system for transceiver channels based on river acoustic tomography. The transmitting and receiving transducers are independent, employing a design where the transmitting and receiving channels operate independently and without interference. Separate transmission channels are designed for the corresponding frequency signals; the transmitting transducer is designed to have a consistent piezoelectric response at its operating frequency. Furthermore, the receiving transducer's sensitivity at its operating frequency is improved, and its electrical signal is proportionally amplified, enhancing transmission capability, increasing the signal-to-noise ratio, and improving anti-interference levels. This invention's non-integrated transceiver structure, with independent operation of the transmitting and receiving channels, eliminates mutual interference, avoids crosstalk and radiation interference in electrical signals, increases signal stability, and improves the quality of the received measurement signal.

[0026] (2) The system and control method of this invention ensure that when each transmitting transducer is vertically positioned, the vertical directional angle of the transmitted signal needs to be greater than 60 degrees (the transmitted sound wave intensity within a vertical directional angle of 60 degrees is greater than -3dB). The operating bandwidth of the receiving transducer in the same group is at least 3% wider than the operating bandwidth of the corresponding matched transmitting transducer. This greatly reduces mutual echo interference, makes the received signal more accurate, improves signal quality, and is also the best form of energy-saving control. Through various anti-interference methods, experiments have shown that noise interference can be significantly reduced. After amplification and filtering, the center measurement signal strength is high, the pre-stage noise is low, and the signal-to-noise ratio is high. The system of this invention improves the signal measurement accuracy by 7-10% compared with existing acoustic tomography flow measurement systems.

[0027] (3) The transmitting transducer on the same bank and the receiving transducers of the adjacent probe group are installed vertically together, with the transmitting transducer installed at the top. Outside the intensity curve range where the transmitted signal intensity attenuation of the transmitting transducer is greater than -3dB, the receiving transducers of the adjacent probe group are installed in the lower part of the water on the same bank. This reduces background noise of the acoustic signal, filters out clutter interference, and improves the quality of the amplified signal.

[0028] The distance between the transmitting transducer and the receiving transducer of the adjacent probe group is greater than twice the wavelength of the transmitted signal. This has been verified through extensive scientific experiments to avoid interference caused by bounce sound waves during transmission when the transducers are too close. If the distance is too far, it increases the cable length and installation cost of the mounting bracket. Therefore, a distance just greater than twice the wavelength of the transmitted signal is optimal, as this is the most scientific and cost-effective method.

[0029] Aside from the power and signal lines, the transmitting and receiving transducers are vertically connected by vibration-damping material supports, such as industrial rubber or engineering plastics, instead of a rigid steel frame. This significantly reduces vibration and noise interference from the rigid connection supports, an interference source that was previously overlooked in existing technologies. Our research team comprehensively considered this and found that it accounts for 2-3% of the overall interference factors, so we made specific technical improvements to overcome it.

[0030] (4) When multiple receiving transducers are arranged vertically, the effects of water depth and temperature on the speed of sound are fully considered. By adjusting the spacing between each vertically arranged receiving transducer, the water temperature difference between adjacent receiving transducers is kept above 1℃, which can ensure stable reception of the transmitted sound wave signal and improve the quality and stability of the received signal. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the transducer layout of the system of the present invention.

[0032] Figure 2This is a diagram showing the vertical directivity of the transmitting transducer in the system of the present invention.

[0033] Figure 3 This is a signal display diagram of the testing equipment for the existing acoustic tomography flow measurement system.

[0034] Figure 4 This is a matched filter diagram for an existing acoustic tomography flow measurement system.

[0035] Figure 5 This is a signal display diagram of the acoustic tomography flow measurement system of the present invention, obtained from the testing equipment.

[0036] Figure 6 This is the matched filter diagram of the system of the present invention.

[0037] Figure 7 This is a circuit diagram showing the connection between the control power amplifier circuit module and the transmitting transducer in the system of this invention.

[0038] Figure 8 This is a circuit diagram showing the connection between the receiving transducer and the AD acquisition circuit module of the system of the present invention. Detailed Implementation

[0039] The technical solutions in the embodiments of the invention will now be clearly and completely described with reference to the accompanying drawings.

[0040] Embodiment 1 of this invention provides an anti-interference system for transceiver channels based on river acoustic tomography, including a control host and multiple independently matched probes. The control host can connect to multiple probes on both sides of the riverbank via a wireless network or data cable. As a remote intelligent control system, the system may also include wireless transmission equipment and a backup battery pack. Each group of probes includes a transmitting transducer and a receiving transducer, and the transceiver channels of adjacent groups of probes operate independently.

[0041] The system operates according to the frequency band of each group of transmitting transducers. Each transmitting transducer has a matched and consistent piezoelectric response within that frequency band, with the piezoelectric response error controlled within ±1.5 dB. When each transmitting transducer is vertically installed, the vertical directivity angle of the transmitted signal needs to be greater than 60 degrees (within a vertical directivity angle of 60 degrees, the transmitted sound wave intensity must be greater than -3 dB) to ensure that the signal effectively propagates to the opposite bank and is received by the matched corresponding receiving transducer, preventing excessive signal attenuation. This also affects the transmission power, and the optimal control value is obtained through repeated experiments.

[0042] Based on the operating frequency band of each group of receiving transducers, each receiving transducer has a matched and consistent receiving sensitivity within that operating frequency band, with an error of ±1.5dB. The operating frequency band of each receiving transducer in the same group is at least 3% wider than the operating frequency band of its corresponding matched transmitting transducer to avoid missing the measurement of transmitted signals. Each receiving transducer is connected to a corresponding matched signal amplifier, which is then uniformly connected to the AD acquisition circuit and filtering circuit of the control host.

[0043] like Figure 1 The transmitting transducer is installed above the water on the same bank. The receiving transducers of adjacent groups of probes are installed below the water on the same bank, and are located outside the intensity curve range where the transmitted signal intensity attenuation of the transmitting transducer is greater than -3dB. See [link to relevant documentation]. Figure 1 The ellipses on either side of the transmitting transducer represent the intensity curve range where the sound intensity attenuates by -3dB. This means that when a transmitting transducer is installed vertically downwards with the connector facing upwards, after emitting a certain amount of sound pressure, the sound intensity in the vicinity is within the range where the sound pressure level has attenuated by -3dB. Controlling the installation distance in this way greatly reduces mutual echo interference, making the received signal more accurate and improving signal quality.

[0044] Figure 2 This is a vertical directivity diagram of the transmitting transducer in the system of the present invention. It can be seen that the receiving transducer is located outside the two large elliptical lines indicating "-3dB" on the vertical directivity diagram of the transmitting transducer. Thus, the receiving transducer is positioned below the transmitting transducer, and its location is in the weaker sound intensity region of the transmitting transducer (i.e., the region where the sound intensity after transmission is less than -3dB). Ideally, the positions should be on the same vertically downward line to better ensure stable installation.

[0045] As an improved implementation, the system deploys transmitting transducers on the same side of the river and receiving transducers of adjacent groups of probes. The distance between the transmitting transducers and the receiving transducers of adjacent groups of probes is greater than twice the wavelength of the transmitted signal. Experimental tests show that this effectively reduces interference.

[0046] Specifically, according to the wavelength formula Where λ is the wavelength, V is the speed of sound in water (1480m / s~1520m / s), f is the operating frequency of the transducer, and the closest distance between the upper edges of the vertical planes of the receiving and transmitting transducers is greater than twice the wavelength λ. For example, the wavelength of a 2000Hz sound wave in water is...

[0047] The transmitting transducers deployed on the same side of the river and the receiving transducers of adjacent probe groups are connected together via vibration-damping material components. Specifically, apart from the shared power and signal lines, the transmitting and receiving transducers are vertically arranged and connected together by vibration-damping material supports, such as vibration-damping industrial rubber or engineering plastics, rather than using rigid metal frames. This significantly reduces vibration and noise interference from rigid metal connecting supports.

[0048] As an improved system architecture implementation, if the river channel is wide and deep, each probe group in the system includes one transmitting transducer and multiple receiving transducers. Multiple receiving transducers can be vertically deployed on the same side of the river. The spacing between each vertically arranged receiving transducer is adjusted according to the changes in water sound velocity at different temperatures, ensuring that the temperature difference between adjacent receiving transducers is greater than 1°C. This design considers the influence of water temperature, impurities, and sound ray variations, preventing situations where one receiving transducer fails to receive a valid signal while others continue to operate normally. This ensures stable reception of the transmitted sound wave signal, compensates for signal loss from a few receiving transducers, and enhances the stability and anti-interference capabilities of signal processing.

[0049] This invention employs a non-integrated design structure for the transmitting and receiving channels based on river acoustic tomography, which isolates them from electrical interference. The transducers only require specific piezoelectric response for transmission or sensitivity for reception, reducing design challenges and manufacturing complexity. Because the transmitting and receiving transducers are independent structures, replacement and maintenance are significantly easier and cheaper than existing integrated transducer probes.

[0050] The system of this invention features a non-interference design for circuit channels, simplifying the operation of both the transmitting and receiving circuits and significantly reducing design complexity. Furthermore, for the receiving circuit, reduced interference from the transmitting circuit lowers background noise, improves the signal-to-noise ratio, and enhances the accuracy of acoustic wave measurement signals, leading to more accurate and reliable subsequent flow rate and velocity calculations. Due to the comprehensive adoption of various anti-interference deployment methods, circuit structures, and improved control methods, the system of this invention achieves 7-10% higher signal measurement accuracy than existing acoustic tomography flow measurement systems.

[0051] The advantages of the system and control method of this invention are demonstrated below through comparative system tests.

[0052] Figure 3 This is a signal display diagram of the test equipment for the existing technology system, reflecting the working electrical parameters of the transceiver used in the existing technology system. It can be seen that the background noise is about 900mV, and the residual noise after the signal is sent interferes with the received signal. Figure 4The existing technology system performs matched filtering on the received signal to obtain the waveform diagram. The waveform diagram shows that the noise in the front stage is relatively large. After the received signal reaches the receiving transducer, the waveform is not very simple and has severe echo. There are many signal bounce waveforms and the signal-to-noise ratio is low (maximum value / average value of front stage noise).

[0053] Figure 5 This is a signal display diagram of the test equipment for the system of this invention, reflecting the operating electrical parameters of the independently separate transducers used in the system, i.e., the use of a separate receiving transducer to receive measurement signals. From Figure 6 As can be seen from the waveform diagram, Figure 6 The preamp noise in the middle is relative to Figure 4 The signal strength is significantly reduced, and the received signal has minimal rebound. After the receiving transducer performs matched filtering on the received signal, the center signal strength is high, the pre-amplifier noise is low, the rebound signal wave is significantly reduced, and the signal-to-noise ratio is high. This invention's system can reduce background noise in acoustic signals, filter out clutter interference, and improve the quality of the amplified signal.

[0054] This invention also provides a control method for an anti-interference system of a transceiver channel based on river acoustic tomography, comprising the following steps:

[0055] (1) Multiple sets of independently matched probes are connected through the control host. Each set of probes includes a transmitting transducer and a receiving transducer. The transmitting / receiving channels of adjacent sets of probes work independently.

[0056] (2) The transmitting transducer is installed above the water on the same bank.

[0057] Outside the intensity curve range where the transmitted signal intensity of the transmitting transducer attenuates by more than -3dB, the receiving transducer is installed with adjacent sets of probes in the water below the same bank.

[0058] (3) According to the working frequency band of each group of transmitting transducers, adjust each of the transmitting transducers to have a matching piezoelectric response in the working frequency band. When each of the transmitting transducers is vertically installed, the vertical directionality angle of the transmitted signal needs to be greater than 60 degrees (the intensity of the transmitted sound wave within the vertical directionality angle of 60° is greater than -3dB).

[0059] Based on the operating frequency band of the receiving transducers in each group, each receiving transducer is adjusted to have a matching and consistent receiving sensitivity in that operating frequency band; the operating frequency band of the receiving transducers in the same group is at least 3% wider than the operating frequency band of the corresponding matching transmitting transducer.

[0060] Adjust the impedance matching of the transmitting channel of each probe's transmitting transducer to achieve maximum transmission power. For detailed implementation procedures, please refer to [reference needed]. Figure 7As shown, the system's control power amplifier circuit module is connected to the transmitting transducer through inductor L2. By adjusting the impedance matching between inductor L2 and the transmitting transducer, the power can be completely delivered to the transducer, achieving maximum power point output.

[0061] According to the matching formula: ω=2πf, the output impedance characteristic of the transducer is measured using an LCR bridge, and R is measured by the instrument. S and X S These are the real and virtual reactances of the transducer at a frequency of 125kHz, respectively. According to the formula R = R... S +X S j, The impedance characteristics at this frequency can be calculated using the formula. X S Given the virtual reactance and f as the frequency, the power amplifier's internal resistance and matching parameters (L is the matching inductance value) can be calculated.

[0062] Regarding the system's receiving circuitry, such as Figure 8 As shown, the receiving transducer, after passing through this preamplifier circuit, amplifies the received acoustic signal and transmits it back to the AD acquisition unit as a certain electrical signal for waveform analysis, thereby improving the signal-to-noise ratio. Adjusting the receiving gain of the preamplifier, i.e., adjusting the ratios of R4 / R3 and R7 / R6, optimizes the received signal transmission.

[0063] The control method of the present invention also includes a transmitting transducer deployed on the same side of the river channel and a receiving transducer of an adjacent group of probes. The distance between the transmitting transducer and the receiving transducer of the adjacent group of probes is greater than twice the wavelength of the transmitted signal to reduce echo interference. The transmitting transducer deployed on the same side of the river channel and the receiving transducer of the adjacent group of probes are connected together by vibration-damping material components to reduce vibration noise interference.

[0064] As an improved control implementation method, each group of probes in the system includes one transmitting transducer and multiple receiving transducers. Multiple receiving transducers can be vertically deployed on the same side of the river channel. The spacing between each vertically arranged receiving transducer is adjusted according to the changes in water sound velocity at different temperatures, ensuring that the temperature difference between adjacent receiving transducers is greater than 1°C. This system considers the influence of water temperature, impurities, and sound ray variations, preventing situations where one receiving transducer fails to receive a valid signal while others continue to operate normally. This ensures stable reception of the transmitted sound wave signal, compensates for signal loss from a small number of receiving transducers, and enhances the stability and anti-interference capabilities of signal processing.

[0065] The present invention features a non-integrated transceiver structure, with the transducer's transmit and receive channels operating independently. This significantly reduces mutual interference, avoids crosstalk and radiation interference in electrical signals, increases signal stability, and improves the quality of received measurement signals.

Claims

1. The anti-interference system of the receiving and transmitting channels based on river acoustic tomography flow measurement is characterized by: It includes a control host, multiple groups of independently matched probes, each group of probes includes a transmitting transducer and a receiving transducer; the receiving / transmitting channels of the probes of adjacent groups work independently; According to the working frequency band of each group of transmitting transducers, each of the transmitting transducers has a matching and consistent transmitting piezoelectric response under the working frequency band, and when each of the transmitting transducers is placed vertically, the vertical directivity angle of the transmitting signal needs to be greater than 60 degrees; According to the working frequency band of each group of receiving transducers, each receiving transducer has a matching receiving sensitivity under the working frequency band; the working frequency band of the receiving transducers in the same group is at least 3% wider than the working frequency band of the corresponding matching transmitting transducer; each receiving transducer is respectively connected to a corresponding matching signal amplifier, and is uniformly connected to the AD acquisition circuit of the control host; The transmitting transducer is installed above the water on the same shore; Outside the intensity curve range where the acoustic intensity of the transmission signal of the transmitting transducer is attenuated by more than -3dB, receiving transducers of adjacent groups of probes are installed below in the water on the same shore.

2. According to claim 1, the anti-interference system for the receiving and transmitting channels based on river acoustic tomography flow measurement is characterized in that: The transmitting transducer and the receiving transducer of the adjacent group of probes arranged in the river channel on the same side are separated by a distance greater than 2 times of the wavelength of the transmitting signal.

3. The anti-interference system for the receiving and transmitting channels based on river acoustic tomography flow measurement according to claim 1 or 2 is characterized in that: The transmitting transducer arranged in the river channel on the same side and the receiving transducer of the adjacent group of probes are connected together through a vibration-damping material component.

4. According to claim 1, the anti-interference system for the receiving and transmitting channels based on river acoustic tomography flow measurement is characterized in that: The probe includes a transmitting transducer and multiple receiving transducers. Multiple receiving transducers are arranged vertically in the river channel on the same side. According to the change of water sound velocity at different temperatures, the layout spacing of each vertically arranged receiving transducer is adjusted. The distance between adjacent receiving transducers is such that the water temperature difference is more than 1°C.

5. A control method for the anti-interference system of the transceiver channel based on river acoustic tomography flow measurement, characterized in that: Includes steps: (1) connecting multiple groups of independently matched probes through a control host, each group of probes comprising a transmitting transducer and a receiving transducer; the receiving / transmitting channels of adjacent groups of probes operate independently; (2) installing the transmitting transducer above the water on the same shore; Outside the intensity curve range where the acoustic intensity of the transmission signal of the transmitting transducer is attenuated by more than -3dB, the receiving transducers of the adjacent groups of probes are installed below the water on the same shore; (3) According to the working frequency band of each group of transmitting transducers, each of the transmitting transducers is adjusted to have a matching and consistent transmitting piezoelectric response under the working frequency band, and when each of the transmitting transducers is placed vertically, the vertical directivity angle of the transmitting signal needs to be greater than 60 degrees; According to the working frequency band of each group of receiving transducers, each receiving transducer is adjusted to have a matching receiving sensitivity in the working frequency band; the working frequency band of the receiving transducers in the same group is at least 3% wider than the working frequency band of the corresponding matching transmitting transducer.

6. The control method of the anti-interference system of the transceiver channel based on river acoustic tomography flow measurement according to claim 5 is characterized in that: Also includes the steps, The impedance adaptation of the transmission channel of the transmission transducer of each group of probes is adjusted to achieve the maximum transmission power.

7. The control method of the anti-interference system of the transceiver channel based on river acoustic tomography flow measurement according to claim 5 is characterized in that: It also includes a transmitting transducer and a receiving transducer of an adjacent group of probes arranged in the river channel on the same side, and the distance between the transmitting transducer and the receiving transducer of the adjacent group of probes is greater than 2 times the wavelength of the transmitting signal.

8. The control method of the anti-interference system of the transceiver channel based on river acoustic tomography flow measurement according to claim 5 is characterized in that: It also includes a transmitting transducer arranged in the river channel on the same side and a receiving transducer of an adjacent group of probes, which are connected together through a vibration-damping material component to reduce vibration and noise interference.

9. The control method of the anti-interference system of the transceiver channel based on river acoustic tomography flow measurement according to claim 5 is characterized in that: The probe includes a transmitting transducer and multiple receiving transducers. Multiple receiving transducers can be arranged vertically in the river channel on the same side. According to the change of water sound velocity at different temperatures, the arrangement spacing of each vertically arranged receiving transducer is adjusted. The distance between adjacent receiving transducers is such that the water temperature difference is more than 1°C.

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